How to: Clean a Zetec IAC - Focus Fanatics
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Old 07-12-2011, 10:25 AM   #1
xecutionr
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How to: Clean a Zetec IAC

This thread is to help everyone with that nasty idle problem with higher mileage Zetecs.

Tools needed:
2 Jack stands
1 Jack]
flat head screw driver
8mm socket with ratchet
(1/4 inch is recommended, 1/2 inch is hard to use in tight spaces)
Carb/Choke Cleaner (semi large can depends on how much buildup there is)


Step 1: raise and support focus with jack stands


Step 2: get your flat head screw driver and take off the intake tube on the throttle body so you can gain access to the IAC when you take it off from underneath


Step 3: get under the car with your 8mm socket ratchet and start feeling up in behind the starter on the intake manifold there should be two bolts loosen them up and then take them out with your hand, they are easy to take out. The IAC Looks like this on the intake manifold, the silver cylinder looking thing.



here is a pic of the IAC location from under the car you can tell its really hidden away





Step 4: once the IAC bolts are out it should be sitting in there because of the tight space, it wont fall out because there is a wire connected to it. get back on topside of the car and grab this wire that my index finger is pointing/laying on and that is the wire you can use to pull the IAC out..

dont jerk manuver the IAC around from atop so that it can easily be pulled out.


Step 5: grab your carb cleaner and go to town on inside of the IAC valve




BEFORE






AFTER






Step 6: let the IAC valve dry in the sun or just air dry until no cleaner comes out of it. then reinstall!

Hope this helps everyone that has this problem!


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Old 07-12-2011, 10:49 AM   #2
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Use THROTTLE BODY cleaner. Most cars have a teflon or similar coating inside metal intake parts. Carb and break clean will take it right off and it will start to pit like a son of a bitch. I found this out when I cleaned the IAC and throttle body in my Ranger. Had to buy a new throttle body and IAC. The butter fly in my throttle body seized up and the IAC seized also. Better safe then sorry.
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Last edited by xxMichaelAnthony; 07-31-2011 at 06:03 AM.
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Old 07-12-2011, 10:55 AM   #3
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Quote:
Originally Posted by xxMichaelAnthony View Post
Use THROTTLE BODY cleaner. Most cars have a teflon or similar coating inside metal intake parts. Carb and break clean will take it right off and it will start to pit like a son of a bitch. I found this out when I cleaned the IAC and throttle body in my Ranger. Had to buy a new throttle body and IAC. The buffer fly in my throttle body seized up and the IAC seized also. Better safe then sorry.
It can cause pitting, but most likely wont.. the carb cleaner is more harsh on the sensors around the TB because it is formulated to remove heavy varnishes found in carburetors. so that means it should be 100% okay to sue on the IAC since it is a valve. dozens of people have used carb cleaner on it it just is stronger than the Throttle body cleaner
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Old 07-12-2011, 11:22 AM   #4
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Quote:
Originally Posted by xecutionr View Post
It can cause pitting, but most likely wont.. the carb cleaner is more harsh on the sensors around the TB because it is formulated to remove heavy varnishes found in carburetors. so that means it should be 100% okay to sue on the IAC since it is a valve. dozens of people have used carb cleaner on it it just is stronger than the Throttle body cleaner
good write up.......I agree with the TB cleaner.....On my Ford Rangers sites they suggest just cleaning...on my Saab forums they suggest to clean and oil it with engine oil........I am not sure what is the correct way?
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Old 07-13-2011, 12:21 PM   #5
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bump let's get this thing int he HOW to section. there is no how to on this and alot of people dont know how to do this...
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Old 07-13-2011, 06:53 PM   #6
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Agreed, I wish i would of had these pictures last summer...couldn't find the damn thing.
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Old 07-13-2011, 08:13 PM   #7
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Great write up - this should be Stickied!!
 
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Old 07-13-2011, 09:53 PM   #8
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thanks guys!
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Old 07-15-2011, 12:24 PM   #9
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bump, lets get this stickied
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Old 07-30-2011, 10:22 PM   #10
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Can the IAC be cleaned with CRS MAF cleaner?
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